GB934306A - Tunnel diode logic circuit - Google Patents

Tunnel diode logic circuit

Info

Publication number
GB934306A
GB934306A GB40015/61A GB4001561A GB934306A GB 934306 A GB934306 A GB 934306A GB 40015/61 A GB40015/61 A GB 40015/61A GB 4001561 A GB4001561 A GB 4001561A GB 934306 A GB934306 A GB 934306A
Authority
GB
United Kingdom
Prior art keywords
diode
tunnel diode
phase
state
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB40015/61A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telecom Italia SpA
Olivetti SpA
Original Assignee
Olivetti SpA
Ing C Olivetti and C SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olivetti SpA, Ing C Olivetti and C SpA filed Critical Olivetti SpA
Publication of GB934306A publication Critical patent/GB934306A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
    • H03K19/10—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using tunnel diodes

Abstract

934,306. Tunnel diode logical circuits. ING.C. OLIVETTI & CIE S.p.A. Nov. 8, 1961 [Nov. 24, 1960], No. 40015/61. Class 40(6). A logical circuit comprises a tunnel diode which is switched from a first voltage state to a second voltage state by the concurrent application thereto of an excitation current and control current pulses, the latter being generated by a source of clock pulses connected to the tunnel diode through a gate selectively controlled by the input signals to the circuit. A logical NOR circuit shown in Fig. 1 has a tunnel diode T excited by a current from source A and connected to a supply of clock pulses B through a star connected gate comprising resistor 10, diode 16 and capacitor 11. In each cyclic operation of the logic circuit input signals are applied through terminals 3, 4, 5 and diodes 6, 7, 8 to resistor 10 during a first phase F 1 and the output signal is taken from terminal 18 only during a second phase F 2 . During the phase F 1 the capacitor 13 is charged to a voltage level corresponding to the high voltage state " 1 " through the diode 7 and resistor 10 as a result of an input signal on terminal 4 having a voltage level corresponding to state "1," the tunnel diode T being in the low-voltage state " 0 " and since the current flowing through the tunnel diode T is limited by resistor 10 it does not switch to its high voltage state "1." At the beginning of the second phase F 2 a clock pulse of amplitude " 1 " is applied to terminal 17 from source B which is blocked by diode 16, terminal 11 being at the voltage of the charged capacitor, and as the excitation current above is insufficient to switch the tunnel diode T the output is a logical "0." If during the next phase F<SP>1</SP> 1 input signals having a logical " 0 " state are applied to the terminals 3, 4, 5, capacitor 13 discharges through resistor 14 so that the voltage of point 11 is at the "0" level, with the result that when clock pulses are supplied to terminal 17, at the beginning of the following phase F<SP>1</SP> 2 , the gate is opened and the clock pulse charges the capacitor 13 and a current pulse passes to the tunnel diode T where this current together with the excitation current is of sufficient magnitude to switch the diode T to its high voltage " 1 " state until at the end of the phase a reset pulse from source C restores the tunnel diode to its initial state "0". The source of reset pulses may be eliminated and the resetting of the diode T may be obtained by interrupting the source A as shown at A<SP>1</SP>, Fig. 2. Specification 907,656 is referred to.
GB40015/61A 1960-11-24 1961-11-08 Tunnel diode logic circuit Expired GB934306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2030460 1960-11-24

Publications (1)

Publication Number Publication Date
GB934306A true GB934306A (en) 1963-08-14

Family

ID=11165571

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40015/61A Expired GB934306A (en) 1960-11-24 1961-11-08 Tunnel diode logic circuit

Country Status (3)

Country Link
US (1) US3182204A (en)
DE (1) DE1164477B (en)
GB (1) GB934306A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260609A (en) * 1989-11-29 1993-11-09 Fujitsu Limited Logic circuit uising transistor having negative differential conductance
US5281871A (en) * 1990-11-21 1994-01-25 Fujitsu Limited Majority logic circuit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL288348A (en) * 1962-02-13
BE628140A (en) * 1962-02-21
US3321643A (en) * 1964-11-25 1967-05-23 Sperry Rand Corp Signal responsive apparatus utilizing tunnel diode means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027465A (en) * 1958-04-16 1962-03-27 Sylvania Electric Prod Logic nor circuit with speed-up capacitors having added series current limiting resistor to prevent false outputs
US3054002A (en) * 1960-10-21 1962-09-11 Bell Telephone Labor Inc Logic circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260609A (en) * 1989-11-29 1993-11-09 Fujitsu Limited Logic circuit uising transistor having negative differential conductance
US5281871A (en) * 1990-11-21 1994-01-25 Fujitsu Limited Majority logic circuit

Also Published As

Publication number Publication date
DE1164477B (en) 1964-03-05
US3182204A (en) 1965-05-04

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